Anadarko climate

Anadarko Frost Dates and Growing Season

NOAA 1991-2020 normals for Anadarko 3 E, 4.3 km from Anadarko, elevation 1168 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Anadarko 3 E. A median date has an even chance of a later freeze in spring, or an earlier one in fall.

The last spring freeze typically comes around April 8 and the first fall freeze around October 30, a growing season of about 202 days.

Median at 36°F
last April 19, first October 21
Median at 32°F
last April 8, first October 30
Median at 28°F
last March 30, first November 7

Last freeze in spring

The chance of a later freeze than the date shown. At 10 percent, one spring in ten still freezes after the date; planting after the 10 percent date for 32°F is the cautious choice.

Threshold10%20%30%40%50%60%70%80%90%
36°FMay 2Apr 28Apr 25Apr 22Apr 19Apr 16Apr 14Apr 9Apr 4
32°FApr 25Apr 20Apr 16Apr 13Apr 8Apr 5Apr 2Mar 30Mar 24
28°FApr 15Apr 8Apr 5Apr 1Mar 30Mar 25Mar 20Mar 15Mar 8
24°FApr 4Mar 31Mar 25Mar 20Mar 15Mar 11Mar 7Mar 3Feb 25
20°FMar 23Mar 15Mar 11Mar 7Mar 3Feb 28Feb 24Feb 19Feb 9
16°FMar 12Mar 5Mar 1Feb 24Feb 19Feb 12Feb 6Jan 30Jan 20

First freeze in fall

The chance of an earlier freeze than the date shown. At 10 percent, one fall in ten freezes before the date.

Threshold10%20%30%40%50%60%70%80%90%
36°FOct 7Oct 13Oct 16Oct 19Oct 21Oct 24Oct 26Oct 30Nov 2
32°FOct 15Oct 21Oct 24Oct 27Oct 30Nov 1Nov 4Nov 7Nov 12
28°FOct 23Oct 29Nov 1Nov 4Nov 7Nov 10Nov 13Nov 18Nov 24
24°FOct 30Nov 4Nov 8Nov 12Nov 15Nov 19Nov 23Nov 29Dec 4
20°FNov 6Nov 13Nov 17Nov 22Nov 26Dec 1Dec 4Dec 10Dec 18
16°FNov 17Nov 24Nov 30Dec 4Dec 9Dec 14Dec 20Dec 28Jan 7

Growing season length

Days between the last spring and first fall freeze at each threshold, with the chance of a season at least that long.

Threshold10%20%30%40%50%60%70%80%90%
36°F203197192187183180176171165
32°F223216212207202198193188181
28°F247240234228224219214208201
24°F272263256250245240235229219
20°F300289282275270264257248239
16°F333322313305298291283275263

How often it gets that cold

The share of years with at least one night at or below each temperature.

36°F or colder
100% of years
32°F or colder
100% of years
28°F or colder
100% of years
24°F or colder
100% of years
20°F or colder
100% of years
16°F or colder
100% of years

Degree days

A degree day is one degree of the daily mean temperature beyond a base, for one day. Heating degree days count cold (the fuel a house burns), cooling degree days heat, growing degree days the warmth a crop needs; each crop has its own base.

Heating degree days, base 65°F
3,723
Cooling degree days, base 65°F
1,964
Growing degree days, base 40°F
7,802
Growing degree days, base 45°F
6,340
Growing degree days, base 50°F
5,025
Growing degree days, base 55°F
3,857
Growing degree days, base 60°F
2,836

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January848012
February651035
March4718127
April22138294
May50169585
June1387835
July05361,001
August0504969
September26257681
October18260360
November4865104
December786021

What this means

NOAA computes these from the daily lows at the station over 1991-2020, fitting the dates of each year's last and first freeze to a distribution, so a date can be stated at any level of risk. 36°F is a frost risk for tender plants on a clear, calm night, since the ground cools below the air above it; 32°F is a freeze; 28°F is a hard freeze that kills most annuals.

The station is 4.3 km from Anadarko. Low ground, valleys and open fields freeze earlier and later than a town center or a hillside.

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Sources

NOAA NCEI U.S. Climate Normals, 1991-2020, annual and seasonal normals for station USC00340224 (Anadarko 3 E). Public domain.